Grinding-mill.



No. 824,520. PATENTED JUNE 26, 1906.

M. P. ABB.

GRINDING MILL.

APPLICATION FILED A-YG. 24,l 1904.

2 SHEETS-SHEET l.

@51) /l'i @HOI/11.0130

N. 824,520. Y PATENTED JUNE 26, 1906. M. P. ABBE'. GRNDING MILL.

APPLICATION FILED AUG.24,1904.

N Z SHEETS-SHEET Z.

y reference characters STFSES ersten No.. senseo.

Specification of Letters Patent.

Patented d' une 26, 1906.

Application filed August 24, 1904i Serial No. 222,024.

To all whom, it may concern:

Beit known that l, MAX F. ABB, a citizen of the United States, residing in New York, borough of Manhattan, in the State of N ew vork, have invented certain new and useful Improvements in Grinding-Mills, of which the following is a specification.

This invention relates to grinding-millsof that class known as pebble-mills, in which a cylinder or drum charged with pebbles is rotated in order to reduce the material to be ground to the required degree of iineness.

The invention aims to provide means for discharging the ground material from the druin o the grinding-mill without interrupting the rotary motion thereof and, further, to n provide a .grinding-mill in which such discharge cancbe readily and reliably effected by the use oi a mechanism of comparatively simple constructionat a great saving of time and labor.

With these and other ends in view the invention consists in the'novel features and combinations of part-s to be hereinafter described and claimed.

In the accompanying drawings, in which the same parts are indicated by the same throughout the several views, Figure 1 is a central longitudinal sec tion through the improved grinding-mill, showing the same in discharging position. Fig. 2 is a central transverse section of the mill, showing the discharge-head in closed position; and Fig. ing ne discharge-head in discharging position` Referring to the drawings, A denotes the cylindrical drum of the improved grinding mill, which is provided with an intermediate charging-opening o and a suitable ciosure (not shown) for said opening. The drum A is provided at its ends with fixed heads .B B', which are secu red to the body ofthe drum by means of hoops d3, constructed of angleiron, as shown. The heads B B are provided with hollow trunni ons 3 b3, respectively, the latter trunnion extending ,into the interior of the drum, as shown in Fig. l. is provided upon its inner surface with a spirally-disp osed inwardly-extending wall, forming a spiral channel or passage S, leading from the outer portion of said head to the interior of the hollow trunnion h3. For the purpose of reinforcing the heads of the drum they are provided exteriorly with radially- 3 is a similar section showv The head B disposed ribs, the ribs upon the head D being designated in the drawings by reference character r, while designated byreference character r3.

Interiorly of the drum A at a point' adjacent to the spiral discharge-channel S of the head B is disposed the discharge-'head of the grinding-mill. Said head is composed of parallel circular plates B3 B3, the plate B2 being tixed at its periphery to the lining 'c of the drum, while the plate B3 is interposed between plate B2 and the spiral passage S and is shiftable angularly with respect to the plate B2 by means to be presently described. The plates constituting the discharge4head'are each provided with two concentric rows of radiallydisposed slots, the slots in the iixed plate Bvra being denoted by reference-letter f and the slots in theshiftable plate B3 by reference character f. ln each plate the slots in the inner and outer rows are preferably arranged in staggered relation, as shown.

The angularly-shiftable plate B3 is pro vided with a peripheral lug extending outwardly therefrom in the plane of the same through a transverse slot in the wall oi' the drum. Said slot is covered by a casing g2, in which is adjustable a hand-screw it, adapted to en age one side of the lug g4 andoperated by a hand-wheel h. At the opposite side of the casing or housing g2 is a bolt g', which is I positively held in place and extends inwardly toward the lug g4. Said bolt g is surrounded by a helical lfprin g, bearing at one end against the end of t e casing and at the other end against the lug g4, posed in the plane of the shiftable dischargeplate B3 and serving to normally maintain the same in discharging position-that is to say, with its slotsl or openings j" in register with the corresponding slots or openings f in the fixed plate B2 of the discharge-head.

Extending in'w ardly through the hollow trunnion b3 of the head is al spindle i, rotatable by means of an exterior wheel i. This spindle is threaded at its inner end, and its threads engage a central hub or boss i2, err-r tending inwardly froin the iixed plate B2, as shown in Fig. 1. Said spindle passes freely through the central portion of the shiftable plate B3, forming a bearing therefor, and has fixed to the same said plate a collar i3, which when the spindle 'i is fed inwardly engages said shiftable pla-te and locks thesame in frictional engagement those upon the head B are said spring being disi adjacent the outer face of IIO with the fixed 'mede eenieel, sliewii, will hereinafter eppeiii.

For 'tli-e "purpose el increasing the t i locking sation 01 the 'gl een kite-ting disclifigelieefl the eentwl pei/'Liens of mij it feces eif seid pls', es sliewii at m, Wlierel iiupiiiteii te s l plates emi the i im materially :incre sed.

ln eirgle-r te limit the mmfei'iient ef the leek ing-spindle i, the seme is provided fi/ith e slieuldei i3, adapt-srl te abut against e sl1011ldei` ifi, formed :it the imjwei' 'portion 01 tile hul) e1: Dess i2, als shown in liig,v l.

The operation f plie improved mill is essentially as fellows'. The mill is charged with pebbles emi the zneteizil te be ground "1re, Ei die eiisrgjempening, zitter which the later closed :imi the drum ret-ated. ey any ble means, the tiuimiensl y* being suiv ted in suitable lieiiiing's. (Net shown.) iuiing the retutien el? the mill tlie diselimgeheeel is ei course nminteiiied in eiesecl er locked pesitimitl1st is te say, the fixed enel sliiltelnle diselmrge--pletes are irietienelly i11- telcmlcei'l in closed position by tile colleTx eetl against the sliiftelile plate tliiough the medium of the lookin spindle i. limiting i1-lie ogiei'zitien of the mill tli -milfe-iew 7i by wliieli the slii'i'talilelieml shifted te exe-sed position, ietsfeeted from the lug e? said sliiltalile plete` I'lll-ie tahitien of the 5f; `-glmiii emitinues until the Niziiiefirl ground i0 the desired degree el l'ii'eiiess, when the smile discharged by Tele2 'sing 'the eeilnr.' if imm imgagement with the slii table plete, mi

iitlf releasing the ed und shittzites iiem their' iir;tienullpleelnzd en* is seen es this has Abeen effected. -Iig g", which lies been erisioiiecl by ing and locking iixeelieeiisms, re- .'mfl iets upon tlm shifts-lne 'heed Bi iu i f -e medium of the shifted te that 'the Y ini-wheel ,s :we depresse@ io aetioii of the eolie? minimi is iretumecl to closed pesiie fi-seeiv .71, and tlie spring a 1s te tension.

ie plates l? l overcomes the entier. of the spring (i, site? nl' li the liziml..ersw .71y is turned in e; direction, so as to be retmetml ioiii 'tlieieg g4., leaving the latte? free te move ii: the easing jl when the heads i3 E released from fi'ietienal engagement.

The impi^0\. "d mill requires no easing foi discharging; the grou ed nmteiia-l l and the lifting of the 4 ing; im' recharging the mill is flis- 'peisefl Wit-l1. et only een the discimiging operation take 'plziee in af'ifery eoiivenient and. @flee-tive manner, 1mit tile efiiee'tie grinding of all the materiel contained in the mill is iiisureil.

Hiwing thus described my invention, l. elaiui es new emi le-sire to secure by Letters Patentl. In grindingdnill, e diseliaige-lieed einA beflyiug 'tivo plates one of which is shifteble with iespeet to the etliei, emi :i spring meting en seid sliiitfible pleite amil normally holding; the sii-fie in discharging position Gilly.

The sliiftable 2. in grindingsmill, e discharge-heed een-n i taule plete eepeiating therewith, means Toi lee/king seid sbiiteble plete in nim-dieelierging of closed position, and selfeeting means for returning; seid head to discharging position upon. the release of said leaking means 4. :i grimliiigdnill provided with e dis t, ,--liend embodying e ilixed plate and the slii'rteble plete ce'pemtiig therewith, means for frietieiiaily interlocking seid plates, and ineens ieleeseil by smei locking ineens for sluiting sind i'teble plete to discharging pesiien.

a g iiitiii'ig-mill, the eomlimetlmi pluim ef :i di: here@ peet te the first, menus iii'iiiilg seid sliiilnble platte te' non dismg positie, seperate min-ms for lerizking in suv/l pusitienj :md sellii, ting Us for slii'iing seid plete te discharging i' upeii the iileese el said locking e fixed diselim e :i winding-mill, :i 1iiselifu'ge-lieix(i :t fil-ml plete emi :i plaie any a willi respect teiiiiy nieuwe the sliil'izilfe plate t0 neit-d pesitlom, .ineens ,lof ieeliing the.'

IDO

sneeze same in such position, and a spring releasable by said loclnng means toshift said plate to discharging position.

7. In a grinding-mill, a discharge-head comprising a ixed diseharge-plate, a shiftable discharge-plate, means to yieldingly hold vthe latter in discharging position, and means to shift said head to non-dischar ing position in opposition to said fLrst-naine means,

8. A grindin .-mi'll including in its construction a line discharge-plate, a shiftable discharge-plate, a sprinT acting upon said plate in the plane thereo. for normallyT maintaining the same in discharging position, and means for shifting said head to non-discharging position, in opposition to said sprintf.

9. A grinding-mill including in its construction a lined discharge-plate, a shiitable discharge-plate, a sprinffrfor normalliT maintaining the latter is discharging position, inea-iis for shifting said last-named plate in opposition to said spring, and means releas able during the rotation of the mill vfor interlocking said plates.

i0. A grinding-mill having a fixed head provided with a hollow trunnion, an interior discharge-head comprising discharge-plates one of 'which is shiftable With respect to the other, and means extending through said trunnion for interlocking said plates.

l. A giindingmiill having a fixed head provided with a hollow trunnion, an exterior discharge-head comprising discharge-plates one of which is shiitalile iidth respect to the v other, and means for interlocking said plates embodying a spindle extending through said 'trunnion and havin@7 an eXteriorly-disposed hand-Wheel mountedD thereon.

l2. A grindin -niill one of the heads of which is provided with an inivai'dlydisposed spiral discharge-passage and with a hollow trunnion into. which said passage leads, an interior dischargediead comprising coperating plz tes, and means extending through said trunnion for interlocking sai plates, said means comprisiiny a defiecting member disposed Within said` truiinion at the inner end thereof.

13. A grindinwmill including in its construction a disoliargediead comprising discharge-plates one ofwhich is singularly shiitable With respect to the other, means disposed centrally of said plates for interlocking the same, and means acting upon the pe-v riplierjyT oi said shiitable head for shifting the same to discharging position. upon the release of said locking means.

14. In a grinding-inill, the combination, with a. rotary drum having a nXed dischargeplate provided with dischargeopenings, .a sliiftable dischargaplate adjacent to said iiXed plate and having openings adapted to be placed in or out of register with the openings thereof, continually-acting means 'for normally holding said shiftable plate in discharging position, means for shifting 'the same to closed position in opposition to said first-named means, and means to frictions-ll:i interlock or release said plates during the rotation of the drum.

15. In a grinding-mill, in combination, a drum having a lined discharge-plate provided With ldischarging-openings, a shiftable discharge-plate adjacent said fixed plateend provided with openings adapted to register with' the openings thereof, a lug extending from said shiftable spring engaging said lug and disposed-in the plane of said plate, and means for engaging the opposite side of said lug and shiftin said plateto closed position, and means or interlocking said plates.

lf ln combination, a drum having a fnied discharge-plate provided With dischargeopenings, said drum being provided with a transverse slot adjacent to said plate, a shiftable discharge-plate having discharge-openfings adapted to register ivith said first-named openings, a lng on said shiftable headextenct ing 'through tne slot in said druin, a casing on the drum extending over said slot, a sprino in said casing hearing against one side of said lug, a hand-screw for engaging the opposite si e thereof, and means releasable during the rotation of said drum lor interlocking said discharge-plates.

ln testimony that l claim the foregoing as mv invention l have signed my naine in presence of tivo subscribing Witnesses.

im F. BB.

TWitnesses z i PAUL Goisrni.. HENRY 5. SUnnninn. 

